Exterior Basement Waterproofing vs. Interior Basement Waterproofing: Which is Right for You?
It is important to waterproof your basement especially if you are torn between two options—exterior basement waterproofing or interior basement waterproofing. Both these methods have their fair share of pros and cons but the best choice ultimately depends on your own specific basement needs. As a homeowner in Lancaster, LA, determining the best method for waterproofing a basement is essential for long-term protection.
In this blog we will compare exterior basement waterproofing vs interior basement waterproofing by exploring the pros and cons of each method, helping you decide for yourself which waterproofing works best for you.
Best Methods For Waterproofing A Basement
Before deciding between interior vs exterior waterproofing for basements let us have a basic understanding of each of the waterproofing methods and learn about the underlying difference between exterior and interior basement waterproofing.
Understanding Exterior Basement Waterproofing
Exterior basement waterproofing is a method that stops water from reaching the foundation before it can enter your basement. This basically involves guarding the exterior foundation walls with waterproof materials to block moisture penetration, which has been proven one of the best methods of waterproofing a basement to keep it dry.
Methods of Exterior Basement Waterproofing
Methods of Exterior Basement Waterproofing
Excavation
The initial step in exterior basement waterproofing involves digging down to the foundation’s footing level around the perimeter of your home. Having the full wall exposed, will be easy for the contractors to closely inspect the foundation for structural issues, cracks, or crevices that may allow water to seep into the basement. The benefit of exterior waterproofing lies in its careful inspection. The depth of digging depends on the size of the property and either hand-digging or heavy machinery may be used. This excavation should be done in such a way that it becomes easy for the workers to apply the waterproofing coating easily and efficiently.
Waterproof Coating
One of the key benefits of exterior basement waterproofing is the tight seal it creates around the foundation, preventing moisture from settling and causing cracks or crevices in the basement. This tight seal is usually achieved using waterproof coatings typically made from tar, asphalt, or elastomeric materials, forming a durable barrier between the foundation wall and groundwater.
Exterior waterproofing is regarded as one of the best methods of waterproofing a basement due to its usage in having different types of coating options available. For example, liquid waterproof membranes can be sprayed or rolled on, providing a strong, flexible, and crack-resistant barrier. Another durable option is sheet membranes, which offer high resilience. By using these coatings, exterior waterproofing helps avoid issues like spalling (flaking of concrete due to moisture), protecting your basement from long-term damage.
Drainage System
Adding a drainage system is one of the best methods of waterproofing a basement because it effectively manages water flow to prevent pooling and seepage by directing it away through proper channels. Common types of drainage systems include weeping tiles, which consist of perforated pipes placed along the footing and covered with gravel to redirect water away from the area.
Another popular option is the French drain, where water moves through a gravel-covered trench with a pipe that may lead to a sump pump or drain field for efficient water removal. This setup is one of the key benefits of exterior basement waterproofing. Although these drainage pipes are complex processes, when laid out precisely and on a slope, they rely on gravity to move water away, making them one of the most reliable waterproofing methods.
Sealing Cracks and Joints
With the inclusion of new technologies, this acts as the benefit of exterior basement waterproofing, helping to keep your basement dry and moisture-free. Since foundation walls are subjected to constant load, cracks and joints, often serve as entry points for water. It’s essential to address these issues by sealing them to prevent seepage.
Modern methods, such as epoxy injections, can be injected into cracks, to form a strong seal, preventing moisture from seeping through. Another method is polyurethane foam injections which when injected fill gaps and cracks with flexibility and effectiveness. These techniques are among the best methods for waterproofing a basement offering long-lasting protection against water infiltration.
Benefits of Exterior Basement Waterproofing (Pros)
Long-term Protection
Exterior waterproofing acts as a first line of defense by stopping the water at the source, preventing it from reaching the foundation. This is considered one of the best methods of waterproofing a basement, as it provides long-term protection with high-quality materials such as elastomeric coatings and robust drainage systems. These systems protect the basement from moisture infiltration, which can lead to issues like mold, mildew, and rotting over time.
Improves Structural Integrity
Having a clean, dry, and secure basement positively impacts the value of the property. One of the benefits of exterior basement waterproofing is that it protects the property from moisture intrusion, water leaks, and damage, reassuring potential buyers about the property’s durability. This durability is what buyers often seek which enhances the property value, thus it stands as one of the best methods of waterproofing a basement, protecting the foundation, keeping it safe, and ensuring a comfortable living space.
Reduces Interior Humidity
Humidity is a major factor that can lead to basement issues like mold and mildew, which thrive in damp conditions. Reducing humidity makes the basement safer, drier, and more comfortable to live in. One of the benefits of exterior basement waterproofing is that it reduces moisture infiltration into the basement and the house thus reducing the interior humidity. This consequently improves air quality inside the basement, reducing musty odors and creating a healthier environment.
Cons of Exterior Basement Waterproofing
Higher Initial Cost Due to Excavation
The difference between exterior and interior basement waterproofing is that the former involves extensive digging and excavation to install pipes and drainage systems that redirect water away from the property, preventing it from seeping into the basement. This process requires manual labor and the depth of excavation depends on the property, which can also drive up the cost. Therefore, one of the best methods of waterproofing a basement may come with a higher price tag. Additionally, the use of high-quality pipes and drainage systems contributes to the upfront cost.
Disruption to Landscaping Around the Home
While there are several benefits to exterior basement waterproofing, there can be some disruption to the property, especially during the initial excavation process. This can affect landscaping, driveways, walkways, or any other features near the foundation.
Challenging in Tight Spaces
If the property is large and spacious then it is easy to excavate to lay down the pipes and drainage systems. However, if the property is small and the foundation is close to adjacent buildings, exterior basement waterproofing may not be one of the best methods of waterproofing a basement. Excavating in such areas could cause disturbances to the neighboring properties, and to avoid disruptions, specialized techniques may need to be employed, which can add both time and cost.
Understanding Interior Basement Waterproofing
Interior basement waterproofing is a common solution to prevent water issues in basements, especially when dealing with minor leaks, humidity, or water seepage that comes from the ground around the foundation. This approach is often more accessible and less costly than exterior waterproofing, as it focuses on managing and redirecting water that has already entered the basement.
Methods of Interior Basement Waterproofing
Interior Sealants
Sealants are applied on the inside to prevent water seepage through porous concrete, making interior waterproofing one of the best methods for waterproofing a basement, especially useful in dealing with water infiltration and condensation. Sealants are easy to apply and act as barriers to moisture intrusion. Other types, such as epoxy and urethane injections are ideal for sealing minor cracks through which water may enter.
Drainage Channels
Drainage channels, essential for redirecting water, are also part of interior basement waterproofing. In Interior waterproofing, drainage channels are installed at the base of the basement walls, just above the floor level, to manage water flow efficiently. Types of drainage channels used in the interior waterproofing typically include French drains which are installed along the base of the walls, to collect excess water and direct it to the sump pit. Another effective drainage method in interior basement waterproofing is the usage of a baseboard system, which is installed directly along the base of the walls and funnels water to the sump pit, much like French drains.
Sump Pump Installation
A sump pump collects water from the drainage channels, making it one of the best methods for waterproofing a basement by effectively removing water during heavy rain or flooding. The discharge pipe automatically pumps the collected water out of the basement. Types of sump pumps include submersible pumps, which sit inside the sump basin for quieter and more efficient operation, and pedestal pumps, which are less expensive and easier to service.
Pros of Interior Basement Waterproofing
Cost-effective Solution
Cost-effectiveness proves to be one of the main advantages of Interior basement waterproofing. With less labor, fewer materials, and no yard excavation required, it is a more affordable option compared to the exterior basement waterproofing. This method is effective for homes that have minor leaks or seasonal dampness, making it a practical solution for managing moisture and proving to be one of the best methods for waterproofing a basement.
Easy Installation Process
The major difference between exterior and interior basement waterproofing is that interior waterproofing is easier to install. Interior waterproofing is simpler and less disruptive. While installing interior waterproofing, workers and contractors can access the basement easily, to install sump pumps and drainage channels without altering the home’s exterior or surrounding landscape.
Immediate Impact on Moisture Levels
With an immediate impact on moisture levels, interior basement waterproofing is also one of the best methods for waterproofing a basement. With the necessary waterproofing done, homeowners can feel the impact of it by visibly seeing the dampness and drier areas of the basement even in humid or rainy conditions.
Cons of Interior Basement Waterproofing
Reactive Waterproofing Method
Interior basement waterproofing manages moisture after it has already entered the basement, so it is less proactive in preventing moisture intrusion initially. The key difference between exterior and interior basement waterproofing is that the interior methods do not address external water pressure, which can lead to moisture slowly seeping in and potentially causing structural damage over time.
Less Effective in High Water Table Areas
Interior waterproofing may not be the best method for waterproofing a basement in areas with a high water table. In such locations, the substantial water pressure around the foundation can overwhelm interior waterproofing methods. Even a sump pump may struggle to manage the continuous inflow of water under these conditions.
Limited Lifespan
Sealants and coatings used in interior basement waterproofing tend to wear over time, requiring reapplication to maintain their effectiveness in preventing water seepage. Additionally, interior drainage channels may require regular de-clogging to prevent blockages from sediment buildup. This frequent requirement of maintenance can be a drawback for homeowners seeking a more affordable and low–maintenance basement setup.
Key Differences Between Exterior and Interior Basement Waterproofing
Exterior Waterproofing: The benefit of the exterior waterproofing method is that it effectively manages and stops water infiltration by acting as a strong barrier. It efficiently prevents water from entering the basement through various coatings, drainage systems, and waterproof membranes, acting as a first line of defense against moisture intrusion. Additionally, it is ideal for new construction or basement renovations, as waterproofing is achieved by digging deep and providing solid foundation support to prevent water infiltration, particularly in areas with high water tables.
Interior Waterproofing: One of the standout differences between exterior and interior basement waterproofing is that interior waterproofing is easier to install. The exterior waterproofing method is labor intensive and requires excavation, which takes more time and money than interior waterproofing. However, some fundamental issues persist with this method, as it does not directly prevent water infiltration since it only redirects the water, helping to keep the basement dry but not stopping it from entering in the first place.
How Basement Finishing, Lancaster, PA Helps You Decide Between Interior vs Exterior Waterproofing for Basements
Basement Finishing, a professional company specializing in basement waterproofing, might be the ideal partner when deciding between interior vs exterior waterproofing for basements. They possess the skills and expertise needed for both waterproofing and finishing, ensuring your basement is both convenient and dry, free from water and moisture infiltration.
Basement Finishing offers the best methods for waterproofing a basement.
Budget-Friendly Solutions for Waterproofing
With budget-friendly solutions for both interior and exterior basement waterproofing, the company offers some of the best methods of waterproofing your basement according to your budget.
Interior Waterproofing: This method is preferable for those who are concerned about budget or have limited space for excavation and pipe installation. Interior waterproofing is a good choice for managing minor water issues, making it one of the best methods for waterproofing a basement without breaking the bank.
Exterior Waterproofing: If the area is frequently inundated with severe flooding or has a high water table, exterior waterproofing is the best method for waterproofing a basement. The engineers and contractors at Basement Finishing will ensure that all the necessary pipes are properly installed, reducing future risks of water damage and helping you avoid additional costs.
Choosing Based on Foundation Type and Home Age
Homes that are older or have weaker foundations may require renovation and refurbishment, as their foundations might have developed structural weaknesses that compromise the basement and the integrity of the house. With expert assessment, the team at Basement Finishing Company can evaluate the conditions and recommend the best methods of waterproofing the basement. For older structures, installing exterior basement waterproofing may be the best option to withstand the water pressure exerted on the foundation. The team at Basement Finishing also performs enhanced durability testing after installation of the pipes and customizes the waterproofing solution to reinforce the home’s stability.
Improving Resale Value Through Waterproofing
Along with improving the foundation’s integrity and keeping the basement dry, Basement Finishing Company also offers guidance on how waterproofing can improve a home’s resale value, with options tailored to different budgets. While most buyers may prefer exterior waterproofing for its proactive approach to keeping water away from the foundation and its longevity in maintaining structural stability, it can be a costly investment for some homeowners. However, effective interior basement waterproofing, as done by Basement Finishing can still serve as a strong selling point. The company’s expertise in renovating the basement ensures a dry, finished, and appealing space that attracts potential buyers.
Contact them and find the best waterproofing method for your basement based on your requirements.
Conclusion
Choosing between exterior and interior basement waterproofing depends on your specific needs. Exterior waterproofing is ideal for preventing water from entering your basement altogether, making it suitable for major water issues and long-term solutions. Interior waterproofing, however, is more cost-effective and effective for minor leaks or managing moisture already present in your basement.
For a tailored approach to protect your basement, consult experts like Basement Finishing to determine the best solution for your home.
Frequently asked questions
1. What’s the main difference between exterior basement waterproofing and interior basement waterproofing?
The difference between exterior and interior basement waterproofing is exterior basement waterproofing prevents water from entering by applying a waterproof membrane and installing drainage outside basement walls. Interior waterproofing, however, is reactive, managing water after it enters the basement using drainage systems and sump pumps to keep the area dry.
2. What are the benefits of exterior basement waterproofing?
The benefits of exterior basement waterproofing include maintaining a strong structural advantage for the foundation and effectively keeping water away. This prevents cracks, tears, and the potential growth of mold and mildew on foundation levels.
3. Is interior or exterior waterproofing better for my basement?
Choosing interior vs exterior waterproofing for basements depends on your location and budget. If you have a larger budget and live in an area with a high water table, exterior basement waterproofing is the best option. However, if you are on a tighter budget and don’t have enough space for deep excavation, interior basement waterproofing can be effective for minor water control needs.
4. What are the best methods for waterproofing a basement?
Combining exterior and interior waterproofing offers optimal basement protection. Exterior methods, like waterproof membranes and French drains, provide durable, long-term defense, while interior solutions, such as sump pumps, address minor issues. For a tailored solution, a professional evaluation from companies like Basement Finishing ensures a dry, secure basement.
5. Which company is best at providing basement waterproofing services?
For reliable and comprehensive waterproofing solutions, Basement Finishing is a top choice. They specialize in both exterior and interior basement waterproofing, offering tailored and expert solutions to your home’s specific needs and what can be the best waterproofing solution that can be suited to you with expert assessments, high-quality materials, and skilled professionals. Basement Finishing ensures your basement remains dry and secure.